This sign indicates that:
A)There is a speed radar on a motorway or dual carriageway.
B)The presence of a vehicle passage control system.
C)There is a speed control device at a point or section of a conventional or multi-lane road, which may include the maximum permitted speed and informational supplementary panels.Correct
The sign warns of the existence of a speed control on a conventional or multi-lane road. It may include the maximum speed by means of the R-301 sign and supplementary panels with additional information about the controlled section. This allows the driver to adjust their speed and comply with the established limits.